============================================
WARNING: possible recursive locking detected
6.2.0-rc1-syzkaller-dirty #0 Not tainted
--------------------------------------------
syz-executor.0/5529 is trying to acquire lock:
ffff8880750e4ae0 (&sdp->sd_quota_mutex){+.+.}-{3:3}, at: bh_get+0x110/0x7c0 fs/gfs2/quota.c:377

but task is already holding lock:
ffff8880750e4ae0 (&sdp->sd_quota_mutex){+.+.}-{3:3}, at: gfs2_quota_sync+0x9b/0x8f0 fs/gfs2/quota.c:1306

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&sdp->sd_quota_mutex);
  lock(&sdp->sd_quota_mutex);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

3 locks held by syz-executor.0/5529:
 #0: ffff888078f580e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: deactivate_super+0x96/0xd0 fs/super.c:362
 #1: ffff8880750e4ae0 (&sdp->sd_quota_mutex){+.+.}-{3:3}, at: gfs2_quota_sync+0x9b/0x8f0 fs/gfs2/quota.c:1306
 #2: ffff8880750e4b70 (&sdp->sd_quota_sync_mutex){+.+.}-{3:3}, at: gfs2_quota_sync+0xae/0x8f0 fs/gfs2/quota.c:1307

stack backtrace:
CPU: 0 PID: 5529 Comm: syz-executor.0 Not tainted 6.2.0-rc1-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
 print_deadlock_bug kernel/locking/lockdep.c:2990 [inline]
 check_deadlock kernel/locking/lockdep.c:3033 [inline]
 validate_chain+0x4843/0x6ae0 kernel/locking/lockdep.c:3818
 __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055
 lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
 __mutex_lock_common+0x1bd/0x26e0 kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
 bh_get+0x110/0x7c0 fs/gfs2/quota.c:377
 qd_fish fs/gfs2/quota.c:476 [inline]
 gfs2_quota_sync+0x325/0x8f0 fs/gfs2/quota.c:1314
 gfs2_sync_fs+0x49/0xb0 fs/gfs2/super.c:650
 sync_filesystem+0xe8/0x220 fs/sync.c:56
 generic_shutdown_super+0x6b/0x310 fs/super.c:474
 kill_block_super+0x79/0xd0 fs/super.c:1386
 deactivate_locked_super+0xa7/0xf0 fs/super.c:332
 cleanup_mnt+0x494/0x520 fs/namespace.c:1291
 task_work_run+0x243/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fef4068d517
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffa82dfa48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fef4068d517
RDX: 00007fffa82dfb19 RSI: 000000000000000a RDI: 00007fffa82dfb10
RBP: 00007fffa82dfb10 R08: 00000000ffffffff R09: 00007fffa82df8e0
R10: 0000555555f988b3 R11: 0000000000000246 R12: 00007fef406e6b24
R13: 00007fffa82e0bd0 R14: 0000555555f98810 R15: 00007fffa82e0c10
 </TASK>